/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


#region usings

using System;
using System.Data;

#endregion

namespace ASC.Common.Data
{
    public class DbTransaction : IDbTransaction
    {
        public DbTransaction(IDbTransaction transaction)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            Transaction = transaction;
        }

        internal IDbTransaction Transaction { get; private set; }

        #region IDbTransaction Members

        public IDbConnection Connection
        {
            get { return Transaction.Connection; }
        }

        public IsolationLevel IsolationLevel
        {
            get { return Transaction.IsolationLevel; }
        }

        public void Commit()
        {
            try
            {
                Transaction.Commit();
            }
            finally
            {
                OnUnavailable();
            }
        }

        public void Rollback()
        {
            try
            {
                Transaction.Rollback();
            }
            finally
            {
                OnUnavailable();
            }
        }

        public void Dispose()
        {
            try
            {
                Transaction.Dispose();
            }
            finally
            {
                OnUnavailable();
            }
        }

        #endregion

        public event EventHandler Unavailable;

        private void OnUnavailable()
        {
            try
            {
                if (Unavailable != null) Unavailable(this, EventArgs.Empty);
            }
            catch
            {
            }
        }
    }
}